We have two chimneys and one fireplace in use. The in use one is central in the ground floor room with equal sized alcoves on each side with the chimney in the centre. The out of use one was clearly in the boardroom, but this is almost identical with equal sized alcoves. In the roof the chimney fills the end wall. The bedroom chimney needs a vent fitting but there is no clue as to where the fireplace should be. Floorboards are right over the room, clearly lade after the removal of the fireplace. Is there any way of locating the old fire place short of starting to demolish across the chimney?